aPTT - Machaon Diagnostics

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aPTT

Justification

The activated Partial Thromboplastin Time (aPTT) is a general coagulation screening test for congenital and acquired deficiencies of the intrinsic and common coagulation pathway factors (XII, XI, IX, VIII, X, V, II, and I). This aPTT uses a reagent sensitive to factor deficiencies, lupus anticoagulants, and heparin. Machaon Diagnostics offers three different aPTT tests (aPTT, aPTT-LA, and aPTT-FS), each with different clinical utility based on differences in sensitivity to the presence of factor deficiencies and lupus anticoagulants.

STAT: < 24 hours (7 days a week)

Clot-based

Draw Tube: Blue Top

Sample Type: Citrated Plasma

Specimen Requirements

	Sample Type	Volume Required	Minimum Volume	Stability
PREFERRED	Citrated Plasma	1mL	0.5mL	Frozen (-20C): 2 weeks Frozen (-80C): 6 months
ALTERNATIVE	-	-	-	-

REJECTION CRITERIA	Thawed in transit, refrozen or clotted sample
SPECIAL INSTRUCTIONS	-

General Information

METHODOLOGY	Clot-based
STAT TAT	< 24 hours (7 days a week)
STAT TAT Performance	> 90% of results released in 24 hours 7 days a week
ROUTINE TAT	< 24 hours (M-F)
ALTERNATIVE NAMES	Activated Partial Thromboplastin Time, PTT
DESCRIPTION	Coagulation screening assay using an aPTT reagent with synthetic phospholipids and colloidal silica activator.
LIMITATIONS	-
NORMAL RANGE	25.1-36.5 seconds
ASSOCIATED TESTING	-
REFERENCES	-
SAMPLE REPORT	Upon request
NEW YORK STATE APPROVED	-

Test Codes

ORDER CODE	P3083
CPT CODE	85730
LOINC CODE	14979-9